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The driver of a car moving towards a rocket
\( \mathrm{P} \) launching pad with a speed of \( 6 \mathrm{~m} \mathrm{~s}^{-1} \) observed that the rocket is moving with speed of \( 10 \mathrm{~m} \mathrm{~s}^{-1} \).
W The upward speed of the rocket as seen by the stationary observer is nearly
(a) \( 4 \mathrm{~m} \mathrm{~s}^{-1} \)
(b) \( 6 \mathrm{~m} \mathrm{~s}^{-1} \)
(c) \( 8 \mathrm{~m} \mathrm{~s}^{-1} \)
(d) \( 11 \mathrm{~m} \mathrm{~s}^{-1} \)
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